Looking for a fix for (No soup for you! The server you're trying to access doesn't want to let you in. Make sure you're signed in as a user with access to this server.)

Plex Media Server
1

Server Version#: 1.18.2309
Player Version#:

hello
Im trying to start my plex service on my NAS (synology DS1816+).
I am unable to setup my plex i try to uninstall and reinstall the app. I also created a new account to see if it would fix it no luck. I keep getting this error.

error
error995×502 18.6 KB

No soup for you!
The server you’re trying to access doesn’t want to let you in. Make sure you’re signed in as a user with access to this server.

Does anyone know a fix for this?